gistfile1.txt

[ec2-user@ip-XXXXXX chef]$ sudo gem uninstall chef
ERROR:  While executing gem ... (Gem::InstallError)
    cannot uninstall, check `gem list -d chef`
[ec2-user@ip-XXXXXX chef]$ sudo gem uninstall chef -v  12.0.0.alpha.2
ERROR:  While executing gem ... (Gem::InstallError)
    cannot uninstall, check `gem list -d chef`
[ec2-user@ip-XXXXXX chef]$ gem list -d chef

*** LOCAL GEMS ***

chef (12.0.0.alpha.2, 11.16.4)
    Author: Adam Jacob
    Homepage: http://www.getchef.com
    License: Apache-2.0
    Installed at (12.0.0.alpha.2): /home/ec2-user/.rvm/gems/ruby-1.9.3-p547
                 (11.16.4): /home/ec2-user/.rvm/gems/ruby-1.9.3-p547

    A systems integration framework, built to bring the benefits of
    configuration management to your entire infrastructure.

chef-zero (3.2, 2.2)
    Author: John Keiser
    Homepage: http://www.opscode.com
    License: Apache 2.0
    Installed at (3.2): /home/ec2-user/.rvm/gems/ruby-1.9.3-p547
                 (2.2): /home/ec2-user/.rvm/gems/ruby-1.9.3-p547

    Self-contained, easy-setup, fast-start in-memory Chef server for
    testing and solo setup purposes